Copyright Research

Copryrighted Photos- the exclusive right to make copies, license, and otherwise exploit a literary, musical, or artistic work, whether printed, audio or video.
http://www.whatiscopyright.org/


Stock Photos- a supply of goods kept on hand for sale to customers by a merchant, distributor, manufacturer
www.istockphoto.com



Public domain photos- the status of a literary work or an invention whose copyright or patent has expired or that never had such protection
http://en.wikipedia.org/wiki/Wikipedia:Public_domain_image_resources



Royalty free photos- photographs, art, music and other created content which may be offered to the public or individuals (normally for a specified amount of money) to be used in specified ways (terms of usage).
http://www.jupiterimages.com/



Model Release for photos- The people in the photo have to sign a release form before you publish the picture.
http://www.dpcorner.com/all_about/releases.shtml